Ed: In a former life I worked for DOD, was the program manager for a Navy field repair program (2M) and I have, since then, continued to be involved in repair to a greater or lesser degree. Ralph's earlier advice was good. Check out the new (soon to be printed) IPC-7711 and IPC-7721 documents (which replace the former IPC-R-700 Repair Manual). If you are in a hurry for information, talk to a fellow named Dan Foster at Pace Inc. in Laurel MD (301/490-9860) or Jeff Ferry at Circuit Repair Corp. Rowley MA (508/948-7937). Both have been technical leaders in development of the new IPC documents mentioned and both are extremely well qualified to discuss the technical aspects of trace repair. I think both companies have conducted quality assurance studies on circuit trace repair (bond strength, peel strength, etc.) but I'm not sure what type of environmental stresses (if any) were associated with their tests. Some of the things that we (DOD) required in the past, and some of the things you no doubt did, have been superseded by newer/better materials and techniques and the results are really quite good. Regards, Jim Moffitt ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################